From: john stultz This patch ensures that cpu_khz is adjusted on cpufreq notifications even when the tsc timesource is not in use. It fixes the mostly cosmetic issue when using the ACPI PM timesource of /proc/cpuinfo not being properly updated when cpu frequency was lowered. --- 25-akpm/arch/i386/kernel/timers/timer_tsc.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletion(-) diff -puN arch/i386/kernel/timers/timer_tsc.c~cpu_khz-adjustment-fix arch/i386/kernel/timers/timer_tsc.c --- 25/arch/i386/kernel/timers/timer_tsc.c~cpu_khz-adjustment-fix Thu Mar 18 13:09:48 2004 +++ 25-akpm/arch/i386/kernel/timers/timer_tsc.c Thu Mar 18 13:09:48 2004 @@ -360,8 +360,9 @@ time_cpufreq_notifier(struct notifier_bl if (variable_tsc) cpu_data[freq->cpu].loops_per_jiffy = cpufreq_scale(loops_per_jiffy_ref, ref_freq, freq->new); #ifndef CONFIG_SMP - if (use_tsc) { + if(cpu_khz) cpu_khz = cpufreq_scale(cpu_khz_ref, ref_freq, freq->new); + if (use_tsc) { if (variable_tsc) { fast_gettimeoffset_quotient = cpufreq_scale(fast_gettimeoffset_ref, freq->new, ref_freq); set_cyc2ns_scale(cpu_khz/1000); _